Badge, just grit your teeth; speak as little as possible; allow yourself several “sneaking away” breaks (not to sneak wine, but to breathe free for a few minutes); and congratulate yourself on every hour that goes by.
When I have to undergo something unpleasant, I first try to go in with a blank slate: I assume it’s a genuinely good time—until it sours.
Then I implement the above principles till it’s over at last.
Though it may seem interminable, it really will be a finite amount of time to endure.
When it’s over, I pat myself on the back and note that it’s “one more notch in my belt”—one more chore dispatched!